JP2001261186A - Carrying device for sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly and surely guide a sheet in the expansion and contraction of a carrying passage length and stably carry the sheet. SOLUTION: This device comprises a guide means 126 arranged between a pair of rollers 100b and 102a to guide the accumulative phosphor sheet S along a vertical carrying passage 106. The guide means 126 comprises first to fourth tape members 136a-136d extensible and contractible in conformation to the change of the vertical carrying passage 106 when the roller 100b is raised and lowered to extend and contract the vertical carrying passage 106. The ends of the first to fourth tape members 136a-136d are drawably housed in first to fourth housing mechanisms 142a, 142b, 160a and 160b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying apparatus for conveying a sheet, the conveying path of which can be extended and contracted.

[0002]

2. Description of the Related Art For example, stimulable phosphors (stimulable phosphors)
There is known a system that once records radiation image information of a subject such as a human body, reproduces the radiation image information on a photographic photosensitive material such as a photographic film, or outputs a visible image on a CRT or the like. I have.

The stimulable phosphor is composed of radiation (X-ray, α-ray, γ
(Rays, electron beams, ultraviolet rays, etc.), a part of this radiation energy is accumulated, and after irradiation with excitation light such as visible light, a phosphor that emits stimulated emission according to the accumulated energy is referred to. The stimulable phosphor is usually used as a sheet-shaped stimulable phosphor sheet (sheet body) because of its easy handling.

In the above-mentioned system, for example, a photographing section for temporarily recording radiation image information of a subject on a stimulable phosphor sheet, and irradiating the stimulable phosphor sheet with the radiation image information recorded thereon with excitation light to emit the excitation light. A reading unit that photoelectrically reads the radiation image information, and an erasing unit that erases the radiation image information remaining on the stimulable phosphor sheet after reading the radiation image information are integrally incorporated, and the stimulable phosphor sheet is A so-called built-in type radiation image information reading apparatus that circulates or reciprocates in the apparatus is employed.

[0005] The above-mentioned radiation image information reading apparatus is generally known as a type having a bed-type imaging table which is disposed so as to be movable in a horizontal direction and on which a patient is placed in a lying posture (lying posture). ing. It is desirable that this type of imaging table be configured to be able to ascend and descend in consideration of the ease of getting on and off the patient. For example, a hydraulically driven elevating mechanism may be used.

[0006]

By the way, the stimulable phosphor sheet accommodated in the radiation image information reading apparatus is usually sandwiched by a plurality of roller pairs,
The sheet is guided and guided by a guide plate disposed between the pair of rollers. For this reason, by moving the movable-side roller pair provided in the movable portion (photographing table) with respect to the fixed-side roller pair provided in the fixed apparatus main body, the fixed-side roller pair and the It is necessary to configure so that the length of the transport path between the movable roller pair and the movable roller pair can be expanded and contracted.

However, since the guide plate is fixed at a preset position, when the movable roller pair is largely separated from the fixed roller pair, the movable roller pair and the fixed roller pair are not separated from each other. In some cases, the guide plate may not be able to sufficiently achieve the function of guiding the stimulable phosphor sheet. This makes it difficult to smoothly transport the stimulable phosphor sheet between the movable roller pair and the fixed roller pair, and it is easy for defective transport to occur, and the stimulable phosphor sheet is transported stably. The problem of not being able to do so has been pointed out.

The present invention solves this kind of problem, and can smoothly and reliably guide the sheet body even when the length of the conveyance path is expanded and contracted, and stably conveys the sheet body. It is an object of the present invention to provide a sheet conveying device capable of performing the operation.

[0009]

In the sheet conveying apparatus according to the present invention, the guide means for guiding the sheet along the conveying path is provided with a guide member which can expand and contract in accordance with a change in the conveying path length. ing. For this reason, the guide member expands and contracts in accordance with the expansion and contraction of the transport path length, and it is possible to smoothly and reliably guide the sheet body via the guide member. Accordingly, it is possible to effectively prevent the sheet body from being poorly transported, and to stably transport the sheet body.

The guide member is constituted by a tape member which holds at least one surface of the sheet member, and an end of the tape member is housed via a housing mechanism so as to be able to be drawn out of the sheet member conveying path. ing. This allows
When the length of the transport path expands or contracts, the tape member is not pulled out from the housing mechanism or drawn into the housing mechanism, and the tape member is not loosened.
Therefore, the tape member is reliably arranged in a desired tension state along the conveyance path, and the sheet body can be smoothly conveyed.

Here, the housing mechanism includes a pulley member that supports the tape member in a loop shape, and an elastic member that pulls the pulley member to apply tension to the tape member. For this reason, the pulley member can feed out or retract the tape member with a movement distance that is substantially half of the change amount of the transport path length, and when the transport path length greatly expands and contracts, the elastic member expands and contracts. Effective reduction can be achieved, and the tape member is not provided with unnecessary tension. In addition, the size of the entire accommodation mechanism can be easily reduced.

Further, the sheet body is a stimulable phosphor sheet, and both side portions of the stimulable phosphor sheet are held from both sides by first to fourth tape members, and the first to fourth tape members are used.
First to fourth accommodation mechanisms are arranged corresponding to the fourth to fourth tape members. Thereby, the stimulable phosphor sheet is
Since the sheet is conveyed while being guided outside the recording range, a high-quality image information reading process is performed without causing any damage or dust adhesion on the recording surface.

[0013]

FIG. 1 is a schematic perspective explanatory view of a radiation image information reading apparatus 10 in which a sheet conveying apparatus according to an embodiment of the present invention is incorporated, and FIG. FIG. 2 is a schematic explanatory diagram of an internal configuration of the tenth embodiment.

The radiation image information reading apparatus 10 is an imaging apparatus in which an apparatus main body 14 disposed on a floor surface (installation surface) 12 and a subject, for example, a patient, are directly placed in a recumbent position (lying position). A table 16 and an elevating mechanism 18 that raises and lowers the imaging table 16 with respect to the apparatus main body 14 are provided. Device body 1
4 includes a first main body 20 that accommodates the elevating mechanism 18 and a second main body 22 that is configured separately from the first main body 20. The second main body 22 includes a controller 24 and a switch. The unit 26 is connected.

As shown in FIGS. 2 and 3, the lifting mechanism 1
Reference numeral 8 denotes first swing arms 30a and 30b which are swingably supported at one end of the first main body 20 (a side away from the second main body 22) via support shafts 28a and 28b; On the other end side (the side close to the second main body portion 22) of the one main body portion 20, there are provided second swing arms 34a and 34b supported to be swingable via support shafts 32a and 32b. First swing arm 3
The connecting shafts 36a and 36b are attached to the substantially central portions of the first and second swing arms 34a and 34b.
The swinging distal ends of the first swinging arms 30a and 30b and the second swinging arms 34a and 34b are engaged with the bottom of an elevating base 38 constituting the imaging table 16.

A plurality of hydraulic actuators are provided on the first swing arms 30a, 30b in proximity to the support shafts 28a, 28b.
For example, first and second hydraulic cylinders 40a and 40b are mounted, and the first and second hydraulic cylinders 40a and 40b are mounted.
rods 42a, 42b extending from the second swing arm 34 via mounting members 44a, 44b.
a, 34b. First and second
The hydraulic cylinders 40a and 40b are controlled by a hydraulic unit 46.

A bellows member 48 having a dustproof and light-shielding function is fixed on the upper and lower bases 38 and the upper portion of the first main body 20 so as to be extendable and contractible. As shown in FIG. 1, the elevating base 38 has a top plate portion that can move forward and backward in the short direction (arrow X direction) of the first main body 20 and the arrow Y direction (longitudinal direction) perpendicular to the arrow X direction. 52 are provided.

A linear touch switch 54 is fixed along both sides of the top plate 52 in the direction of the arrow X. The touch switch 54 controls ON / OFF of a lock unit (not shown) for locking the top panel 52. While the touch switch 54 is pressed, the top panel 52 is pressed.
Has been unlocked. The top plate 52 is provided with a cover member 56 located outside the touch switch 54.

As shown in FIG. 2, the elevating base 38 is provided with an imaging section 80 for temporarily recording radiation image information of a subject on the stimulable phosphor sheet S, while the apparatus main body 14 is provided with the radiation image. A reading unit 82 for irradiating the stimulable phosphor sheet S on which information is recorded with laser light L as excitation light to read the radiation image information photoelectrically, and remaining on the stimulable phosphor sheet S after reading. An erasing unit 84 for erasing the radiation image information to be erased, and, for example, three stimulable phosphor sheets S in the radiation image information reading apparatus 10.
And a circulating transport system 86 for circulating.

As shown in FIG. 4, the stimulable phosphor sheet S
Are circulated and conveyed by sandwiching only the ears Sa and Sb provided on both sides thereof, and reinforcing plates 88a and 88b are fixed to the back side of the stimulable phosphor sheet S.

As shown in FIG. 2, the photographing section 80 includes a positioning member 90 for positioning the stimulable phosphor sheet S.
And a holding plate 94 that is swingable via a fulcrum 92 for holding the stimulable phosphor sheet S in the photographing unit 80. In the vicinity of the entrance of the photographing unit 80, a circulating transport system 8 is provided.
6, a roller pair 100a is disposed. The roller pair 100a is separated from the roller pair 100a by a predetermined distance.
00b is provided. The roller pair 100a, 100b
It is supported by the elevating base 38 and moves up and down integrally with the elevating base 38.

A roller pair 102a and a plurality of roller pairs 102b constituting a circulating transport system 86 are disposed in the first main body 20, and are independent of the circulating transport system 86 in the second main body 22. Roller pair 104 is arranged. The roller pairs 100a, 100b, 102a, 102b, and 104 are configured to hold and transport only the ears Sa, Sb of the stimulable phosphor sheet S.

The circulating transport system 86 includes a vertical transport path 106 extending in the vertical direction from the photographing section 80 and a vertical transport path 10.
6 and a horizontal conveying path 108 extending horizontally from the lower end to the roller pair 104. After the traveling direction is changed by 180 ° by the roller pair 104, it passes through the reading unit 82 and is Conveyance path 110 extending to
And a switchback transport path 112 connected to the vertical transport path 106 by performing switchback after changing the traveling direction by 180 ° at the tip of the inclined transport path 110. In the switchback transport path 112, a pair of rollers 114 that can rotate forward and backward are arranged.

In the vertical transport path 106, the length of the transport path between the pair of rollers 100b and 102a can be expanded and contracted by moving the photographing table 16 up and down. The transport device 120 according to the present embodiment is incorporated in the vertical transport path 106. . As shown in FIGS. 5 and 6, the transport device 120 includes a roller pair 102 a, which is a fixed roller pair rotatably supported on a fixed base 122 fixed to the first main body 20, and a lifting base 38. And is rotatably supported by a movable base 124 which can move forward and backward with respect to the fixed base 122, and the roller pair 102a
Roller pair 1 which is a movable roller pair whose distance between the roller pair is variable
00b and guide means 126 for guiding the stimulable phosphor sheet S along the vertical transport path 106.

On the fixed base 122, a pair of first driving rollers 128 constituting the roller pair 102a, and a pair of first nip rollers 13 which can advance and retreat to the first driving roller 128, are provided.
0 is rotatably supported. The first driving roller 128 and the first nip roller 130 are used for the stimulable phosphor sheet S.
The length in the axial direction is set so as to sandwich only the ears Sa and Sb. Similarly, a pair of second drive rollers 132 constituting the roller pair 100b are provided on the movable base 124.
And a pair of second nip rollers 134 are rotatably supported.

The guide means 126 includes guide members for holding the ears Sa and Sb of the stimulable phosphor sheet S from both sides, for example, first to fourth tape members 136a to 136d. A first guide for guiding the ear Sa of the stimulable phosphor sheet S
The second tape member 136a, 136b extends vertically between the pair of rollers 100b, 102a to form the vertical transport path 106, and one end (lower end) of the first and second tape members 136a, 136b. After engaging with the guide roller 138a, are fixed to the fixing base 122 via the fixing members 140, respectively.

First and second tape members 136a, 136
Reference numeral 6b engages with a guide roller 138b which is located near the lower side of the roller pair 100b and supported by the elevating base 38.
The other ends (upper ends) of the first and second tape members 136a and 136b are engaged with a plurality of guide rollers 141 provided on the movable base 124 outside the vertical transport path 106, and then the first and second tape members 136a and 136b are engaged. A first and a second accommodation mechanism 142a for accommodating the tape members 136a and 136b so that they can be pulled out;
142b.

As shown in FIGS. 5 and 7, the first accommodation mechanism 142a includes a frame 144 extending in the width direction of the stimulable phosphor sheet S and fixed to the movable base 124.
A slide base 148 is arranged on the frame 144 via a guide rod 146 so as to be movable in the directions of arrows B and C. One ends of tension coil springs (elastic members) 150a, 150b are engaged with the slide base 148, and the coil springs 150a,
The other end of 50b is fixed to the end of frame 144.

On the slide base 148, a pulley member 152 for supporting the first tape member 136a in a loop shape is rotatably provided.
A roller 154 for extending the first tape member 136a to the pulley member 152 along the frame 144;
After extending the first tape member 136a along the frame 144, a fixing member 156 for fixing an end of the first tape member 136a is provided. Note that the above-described first storage mechanism 142a and second storage mechanism 142b are configured in the same manner, and the same components are denoted by the same reference numerals, and detailed description thereof will be omitted.

Third and fourth tape members 136c, 136
Reference numeral 6d is disposed between the pair of rollers 102a and 100b via the guide rollers 158a and 158b in correspondence with the vertical transport path 106 to guide the ears Sb of the stimulable phosphor sheet S. Third and fourth tape members 136c, 136
6d, the lower end of the fixing member 15 provided on the fixing base 122.
9 and the third and fourth tape members 1
The upper ends of 36c and 136d are housed in the third and fourth housing mechanisms 160a and 160b fixed to the movable base 124 so as to be freely drawn out. The first to fourth accommodation mechanisms 14
2a, 142b, 160a, and 160b have the same configuration, and the same components are denoted by the same reference characters, and detailed description thereof will be omitted.

As shown in FIG. 2, the circulation transport system 86 has three
There are three stimulable phosphor sheets S, and three standby positions of the stimulable phosphor sheet S include a first standby position ST1 where the photographing unit 80 is set and a horizontal transport path 1
A second standby position ST2 arranged at 08 and a third standby position ST3 arranged at the erasing section 84 are provided.

The reading section 82 is provided in the second main body section 22 and has a sub-scanning conveyance means 220 for sub-scanning and conveying the stimulable phosphor sheet S in the horizontal direction (direction of arrow A). A laser light irradiating means (excitation light irradiating means) 222 for irradiating a laser beam L as excitation light in a substantially vertical direction to the stimulable phosphor sheet S to perform main scanning; First and second light condensing systems 224 and 226 that photoelectrically read stimulated emission light generated from the phosphor sheet S are provided.

The sub-scanning / conveying means 220 includes first and second roller pairs 228 and 230 which are driven to rotate in synchronization with each other.
Is provided. The first light collection system 224 includes a stimulable phosphor sheet S
A first light guide 232a disposed along the main scanning line at the irradiation position of the laser light L on the recording surface of the first light guide, and a first photomultiplier 234a mounted on the first light guide 232a. The second light condensing system 226 is disposed along the main scanning line on the back surface of the stimulable phosphor sheet S.
A light guide 232b and a second photomultiplier 234b attached to an end of the second light guide 232b are provided.

The erasing section 84 includes a first erasing unit 240a disposed on the recording surface side of the stimulable phosphor sheet S and a second erasing unit 240b disposed on the back side of the stimulable phosphor sheet S. Prepare. In the first and second erasing units 240a and 240b, the erasing light sources 24 are respectively provided.
2a and 242b are arranged.

As shown in FIG. 1, the controller 24 comprises:
Lamp group 260 having a plurality of lamps and display 2
62 and a shooting size display lamp group 263 with a switching key
And an operation panel 264 provided with. When the power is turned on by operating a console (not shown),
When the photographing size is selected, the lamp groups 260, 263
The information is displayed on the display 262, and the ID number and patient name of the patient registered on the console or the imaging menu are displayed on the display 262.

The switch unit 26 includes a first foot switch 270 for unlocking the top 52 constituting the imaging table 16 in the horizontal direction, and a lowering switch for lowering the imaging table 16. A second foot switch 272, a third foot switch 274 for raising the imaging table 16, and a fourth foot switch 27 for emergency stop for forcibly stopping the elevating operation of the imaging table 16
6 is provided. The X-ray irradiating means 2 is provided above the top plate 52.
82 are arranged.

The operation of the radiation image information reading apparatus 10 thus configured will be described below.

First, an ID card in which ID information such as an ID number and a name of a patient are recorded is created, and the ID card is read by a console (not shown). In this console, the user selects an imaging part such as the chest and abdomen and an imaging menu. Further, a photographing size is selected as needed, and then the patient as a subject is photographed on the photographing table 16.
Place on top.

At this time, the height position (in the direction of arrow Z) of the imaging table 16 is adjusted according to the condition of the patient, the height of the patient, or the transport mode of a wheelchair or a stretcher. Specifically, when the operator steps on the second foot switch 272, the first and second hydraulic cylinders 40a and 40b are driven via the hydraulic unit 46 constituting the lifting mechanism 18 (see FIG. 3). Therefore, the rods 42a and 42b of the first and second hydraulic cylinders 40a and 40b move inward, and the rods 42a and 42b are attached to the mounting members 44.
a and the second swinging arm 34 connected via 44b
a, 34b swing downward about the support shafts 32a, 32b.

The first swing arms 30a, 30b are connected to the second swing arms 34a, 34b via connecting shafts 36a, 36b.
b is connected to the second swing arm 34a, 34
b swings downward, the first swing arm 30
a and 30b swing downward about the support shafts 28a and 28b. As a result, the elevating base 38 moves downward, and the imaging table 16 descends.

On the other hand, when the operator operates the third foot switch 274
, The first and second hydraulic cylinders 40a, 40b are driven via the hydraulic unit 46 in the opposite direction. Therefore, the elevating base 38 supported by the first swing arms 30a and 30b and the second swing arms 34a and 34b moves upward, and the imaging table 16 moves up.

As described above, the height of the imaging table 16 is adjusted so that the patient can easily get on the top 52. And
In a state where the patient is lying on the top 52 in the recumbent position (lying position), the operator selectively operates the second foot switch 272 or the third foot switch 274 to cause the top 5 to move.
Adjust the height of No. 2 to a height position that is easy to work.

When the height of the imaging table 16 is adjusted so that the operator can easily work, the operator operates the first foot switch 270 or is provided on the top panel 52. By continuing to turn on the touch switch 54, the lock of the top plate 52 is released. Therefore, for example, the operator moves the top plate 52 forward, backward, left and right (in the directions of the arrow X and the arrow Y) while the operator keeps pressing the touch switch 54.
The patient's imaging region is moved to the X-ray irradiating unit 282.
The position of the patient is adjusted so as to enter the irradiation frame according to.
After the patient's imaging region is positioned, the hand is released from the touch switch 54, and the top plate 52 is locked immovably.

Next, the X-ray irradiating means 282 is driven, and the radiation image information of the patient is recorded (photographed) on the stimulable phosphor sheet S arranged in the photographing section 80. At this time, the other stimulable phosphor sheets S are placed in the second and third standby positions ST.
2, ST3.

After the photographing process, the stimulable phosphor sheet S is taken out of the photographing unit 80 with the ears Sa and Sb held therebetween under the rotating action of the roller pair 100a constituting the circulating transport system 86, and is taken out from the photographing unit 80. , 102a and guided by the guide means 126 (see FIG. 4), and transferred from the vertical transport path 106 to the horizontal transport path 108. Further, as shown in FIG. 2, the stimulable phosphor sheet S is conveyed from the first main body 20 to the second main body 22 under the rotating action of the plurality of roller pairs 102b, and passes upward through the roller pair 104. After the conveyance direction is changed by 180 °, the image is sent to the sub-scanning conveyance unit 220 constituting the reading unit 82.

In the sub-scanning conveyance means 220, the first and second roller pairs 228 and 228 are driven by a motor (not shown).
230 is driven to rotate in synchronization with the stimulable phosphor sheet S.
Are transported in the sub-scanning direction in the direction of arrow A with the ears Sa and Sb being sandwiched between the first and second roller pairs 228 and 230. At that time, the laser beam L is derived from the laser beam irradiating means 222 and is irradiated on the recording surface of the stimulable phosphor sheet S to perform main scanning.

Thus, the stimulated emission light emitted from the recording surface side of the stimulable phosphor sheet S is read photoelectrically by the first condensing system 224, and is transmitted through the transparent base surface to transmit the stimulable phosphor sheet S. The stimulated emission light emitted from the back surface side of the body sheet S is photoelectrically read by the second condensing system 226.

The stimulable phosphor sheet S after the reading process
Is transported from the second main body portion 22 to the first main body portion 20 side,
The sheet is sent to the erasing section 84 along the inclined conveyance path 110. In the erasing section 84, the first and second erasing units 240
a, 240b constituting erasing light sources 242a, 242b
The erasing light is applied to both surfaces of the stimulable phosphor sheet S through the irradiating device, and the erasing process of the radiation image information remaining on the stimulable phosphor sheet S is quickly performed.

After the erasing process, the stimulable phosphor sheet S is sent to the switchback conveyance path 112 with the conveyance direction changed from the inclined conveyance path 110 downward by approximately 180 °. Roller pair 11 constituting this switchback conveyance path 112
4 is rotated in the reverse direction, so that the stimulable phosphor sheet S
Is the vertical path 1 from the switchback path 112
06, and is disposed again in the photographing unit 80 via the roller pair 100a, 100b.

In this case, in the present embodiment, the stimulable phosphor sheet S is smoothly moved in the apparatus main body 14 even when the length of the vertical transport path 106 is expanded and contracted by the photographing table 16 performing the vertical movement. Can be transported. That is, the imaging table 16
When the roller pair 100b rises, the roller pair 100b mounted on the movable base 124 moves in the
The transport path length between the roller pair 02a and the roller pair 100b is extended.

Here, as shown in FIG.
4 moves in the direction of arrow Z1, the first and second tape members 136a and 136b have one end fixed to the fixed base 122 via the fixed member 140, and thus the first and second tape members 136a and 136b are attached to the movable base 124. 1st and 2nd accommodation mechanism 142
a and 142b to the roller pair 102a side.
In the first and second accommodation mechanisms 142a and 142b, FIG.
As shown in FIG. 1, the first and second tape members 136a, 136a,
36b is supported in a loop through a pulley member 152, and the first and second tape members 136a, 136a
An end of 6b is fixed to the fixing member 156.

Therefore, as shown in FIG.
4 is moved in the direction of arrow Z1, whereby the pulley member 1 is moved.
A pulling force acts on arrow 52 in the direction of arrow B, and the pulley member 152 moves in the direction of arrow B against the elastic force of the coil springs 150a and 150b. As a result, the first and second tape members 136a and 136b are fed out from the first and second storage mechanisms 142a and 142b, and even if the movable base 124 largely moves in the direction of arrow Z1, the distance between the roller pair 100b and 102a is maintained. Are the guide rollers 138a, 13
8b supported by the first and second tape members 136.
a and 136b are arranged. For this reason, the ear Sa of the stimulable phosphor sheet S can be smoothly and reliably guided between the pair of rollers 100b and 102, and the stimulable phosphor sheet S can be stably conveyed.

On the other hand, the third and fourth tape members 136
c, 136d, the movable base 124 is indicated by the arrow Z similarly to the first and second tape members 136a, 136b described above.
When moving in one direction, the third and fourth tape members 136c, 136d are guided by guide rollers 158a, 158b.
It is reliably fed out in accordance with the extension of the length of the transport path, so that the ears Sb of the stimulable phosphor sheet S can be transported smoothly.

When the movable base 124 moves in the direction of arrow Z2 (downward), the guide roller 138b is displaced close to the guide roller 138a, and the first and second guide rollers 138a and 138b are moved between the guide rollers 138a and 138b. 2 tape member 1
Surplus portions are generated at 36a and 136b. At that time, the first
In the first and second accommodation mechanisms 142a and 142b accommodating the second tape members 136a and 136b, the coil springs 150a and 150
The pulley member 152 moves in the direction of arrow C under the action of 0b. Thereby, the first and second tape members 136 are formed.
a and 136b are the first and second accommodation mechanisms 1
Absorbed by 42a, 142b.

Therefore, even if the movable base 124 is moved to the lowermost position, the first and second tape members 136a and 136b are not unnecessarily loosened between the guide rollers 138a and 138b, and the stimulable phosphor sheet is not lost. The ear Sa of S can be reliably guided. On the other hand, also in the third and fourth tape members 136c and 136d, the movable base 12
4 also moves downward, the guide rollers 158a,
The ears Sb of the stimulable phosphor sheet S can be reliably guided without causing slack between the 158b.

As described above, in the present embodiment, the movable base 1
When arranging 24 at an arbitrary position, the first to fourth tape members 136a to 136d are reliably arranged between the roller pairs 100b and 102a at any height position,
Poor transport of the stimulable phosphor sheet S due to a short guide length can be effectively prevented. Thereby, the movable base 1
The roller pair 100b, 1
The effect is obtained that the stimulable phosphor sheet S can be stably conveyed between 02a and the configuration of the guide means 126 is effectively simplified.

Further, the guide means 126 is provided with the first to fourth tape members 13 which can extend and contract with respect to the vertical transport path 106.
6a to 136d.
26 can be produced economically. The first to fourth tape members 136a to 136d may be formed of, for example, a resin material, or may be formed of an extremely thin metal plate.

Further, the first to fourth accommodation mechanisms 142
Each of a, 142b, 160a, and 160b includes a pulley member 152 that supports the first to fourth tape members 136a to 136d in a loop shape. Therefore, the movable base 1
When 24 moves by distance H in the direction of arrow Z1, pulley member 152 moves by distance H / 2 in the direction of arrow B, and even if the moving distance of movable base 124 becomes considerably large, the first to fourth pulley members 152 move. Storage mechanisms 142a, 142b, 160a and 1
The size in the length direction of 60b can be significantly reduced. This facilitates the miniaturization of the entire transport device 120, and the first to fourth tape members 136a to 136a to 136a to 136a.
There is an advantage that it is possible to surely prevent the 136d from being applied with an unnecessarily large tension.

Although the present embodiment has been described using the built-in type radiation image information reading apparatus 10 in which the stimulable phosphor sheet S is circulated in the apparatus main body 14, the present invention is not limited to this. The sheet body may be a photographic photosensitive film or the like on which an image is directly recorded, and may be used in various transport devices in which a transport path length between a pair of rollers for nipping and transporting this type of sheet body can be expanded and contracted. Can be applied.

[0060]

In the sheet conveying apparatus according to the present invention,
When the conveying path length for conveying the sheet body expands and contracts, the guide member for guiding the sheet body expands and contracts in accordance with the change in the conveying path length, so that the sheet body can be smoothly conveyed. As a result, a stable conveyance process of the sheet body with no conveyance failure can be efficiently performed, and the configuration can be simplified.

[Brief description of the drawings]

FIG. 1 is a schematic perspective explanatory view of a radiation image information reading apparatus incorporating a sheet conveying apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory view showing an internal configuration of the radiation image information reading device.

FIG. 3 is a perspective view showing an internal configuration of an apparatus main body and an imaging table which constitute the radiation image information reading apparatus.

FIG. 4 is a perspective view of a stimulable phosphor sheet.

FIG. 5 is an explanatory perspective view of the transfer device.

FIG. 6 is an explanatory side view of the transfer device.

FIG. 7 is a perspective explanatory view of a housing mechanism that constitutes the transport device.

FIG. 8 is a diagram illustrating the operation of the transport device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Radiation image information reading apparatus 12 ... Floor surface 14 ... Device main body 16 ... Imaging stand 18 ... Elevating mechanism 20, 22 ... Main body 24 ... Controller 26 ... Switch part 38 ... Elevating base 40a, 40b ...
Hydraulic cylinder 46 Hydraulic unit 52 Top plate 80 Photographing unit 82 Reading unit 84 Erasing unit 86 Circulating transport system 100a, 100b, 102a, 102b, 104, 1
14, 128, 130 roller pair 106 vertical transport path 120 transport device 122 fixed base 124 movable base 126 guide means 136a to 130
d: Tape member 138a, 138b, 141, 158a, 158b: Guide roller 140, 156, 159: Fixing member 142a, 142b, 160a, 160b: Housing mechanism 148: Slide base 150a, 150
b: coil spring 152: pulley member 154: roller S: stimulable phosphor sheet Sa, Sb: ear

Claims (4)

[Claims] An apparatus for conveying a sheet body, the length of which is capable of expanding and contracting a conveyance path for conveying the sheet body, comprising: guide means for guiding the sheet body along the conveyance path; A sheet conveying device, comprising: a guide member that can expand and contract in accordance with a change in the conveying path length when the conveying path length expands and contracts. 2. The conveying device according to claim 1, wherein the guide member is formed of a tape member that holds at least one surface of the sheet member, and an end portion of the tape member outside the sheet member conveying path. A sheet conveying device, comprising: a housing mechanism for housing the sheet body so that it can be pulled out. 3. The transport device according to claim 2, wherein the accommodation mechanism applies tension to the tape member by pulling the pulley member and a pulley member that supports an end of the tape member in a loop shape. A sheet conveying device comprising: an elastic member to be provided; 4. The conveying device according to claim 2, wherein the sheet member is a stimulable phosphor sheet, and the tape member is provided on both sides of the stimulable phosphor sheet outside a recording range from both sides. A sheet conveying device, comprising: first to fourth tape members to be held; and the storage mechanism includes first to fourth storage mechanisms corresponding to the first to fourth tape members.